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CVE-2026-23318

ALSA: usb-audio: Use correct version for UAC3 header validation

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 4.20, 5.4, 5.10.253, 5.15.203, 6.1.167, and 4 more
None on Exploit-DB, Metasploit or GitHub

Summary

In the Linux kernel, the following vulnerability has been resolved: ALSA: usb-audio: Use correct version for UAC3 header validation The entry of the validators table for UAC3 AC header descriptor is defined with the wrong protocol version UAC_VERSION_2, while it should have been UAC_VERSION_3. This results in the validator never matching for actual UAC3 devices (protocol == UAC_VERSION_3), causing their header descriptors to bypass validation entirely. A malicious USB device presenting a truncated UAC3 header could exploit this to cause out-of-bounds reads when the driver later accesses unvalidated descriptor fields. The bug was introduced in the same commit as the recently fixed UAC3 feature unit sub-type typo, and appears to be from the same copy-paste error when the UAC3 section was created from the UAC2 section.

Timeline

  1. CVE published
  2. Record last updated

Affected versions

  • Linux Linux

    From 57f8770620e9b51c61089751f0b5ad3dbe376ff2 · fixed in 82a7d0a1b88798de1a609130080ce0c65dd869e9; From 57f8770620e9b51c61089751f0b5ad3dbe376ff2 · fixed in 8307d93e63d5f54ef10412d4db2dd551e920dee4; From 57f8770620e9b51c61089751f0b5ad3dbe376ff2 · fixed in 0dcd1ed96c03459cf14706885c9dd3c1fd8bd29f; From 57f8770620e9b51c61089751f0b5ad3dbe376ff2 · fixed in a0c6ae2ea84528f198bf7fd0117f12fd0cf6d7cc; From 57f8770620e9b51c61089751f0b5ad3dbe376ff2 · fixed in d3904ca40515272681ae61ad6f561c24f190957f; From 57f8770620e9b51c61089751f0b5ad3dbe376ff2 · fixed in 1e5753ff4c2e86aa88516f97a224c90a3d0b133e; From 57f8770620e9b51c61089751f0b5ad3dbe376ff2 · fixed in 499ffd15b00dc91ac95c28f76959dfb5cdcc84d5; From 57f8770620e9b51c61089751f0b5ad3dbe376ff2 · fixed in 54f9d645a5453d0bfece0c465d34aaf072ea99fa; From 4.19.84 · fixed in 4.20; From 5.3.11 · fixed in 5.4

  • Linux Linux

    5.4

  • KernelLinux

    From 5.4.0 · fixed in 5.10.253; From 5.11.0 · fixed in 5.15.203; From 5.16.0 · fixed in 6.1.167; From 6.2.0 · fixed in 6.6.130; From 6.7.0 · fixed in 6.12.77; From 6.13.0 · fixed in 6.18.17; From 6.19.0 · fixed in 6.19.7

References 8

git.kernel.org